Tan-Tan Zhang

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Most biopotential readout front-ends rely on the g m- C lowpass filter (LPF) for forefront signal conditioning. A small g m realizes a large time constant ( τ = C / g m) suitable for ultra-low-cutoff filtering, saving both power and area. Yet, the noise and linearity can be compromised, given that each g m cell can involve one or several noisy and nonlinear(More)
— This paper describes a high-dynamic-range 2.4 Hz-to-10 kHz wide-range tunable 5 th-order Butterworth lowpass filter for biomedical applications. A differential g m-C topology in conjunction with a subthreshold-biased wide-g m-range OTA realizes efficiently a wide frequency tuning capability. For capacitance savings with consequent silicon area reduction,(More)
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